EP0262321A2 - Composite vacuum bag material having breather surface - Google Patents
Composite vacuum bag material having breather surface Download PDFInfo
- Publication number
- EP0262321A2 EP0262321A2 EP87110534A EP87110534A EP0262321A2 EP 0262321 A2 EP0262321 A2 EP 0262321A2 EP 87110534 A EP87110534 A EP 87110534A EP 87110534 A EP87110534 A EP 87110534A EP 0262321 A2 EP0262321 A2 EP 0262321A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- vacuum bag
- elastomer
- substrate
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/544—Details of vacuum bags, e.g. materials or shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2883/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as mould material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0072—Roughness, e.g. anti-slip
Abstract
Description
- This invention relates to materials used to surround composites, laminates and the like during a vacuum bagging operation in which a negative pressure is applied within the bag to compress the composite or laminate during a cure cycle.
- The production of various types of laminates or composites requires the application of external pressure. For example, in the manufacture of safety windows for vehicles, a plastic film is sandwiched between a pair of glass sheets, and the assembly is compressed and heated to complete the laminate. If the surfaces of the laminate are flat, then flat platens may be employed. If the surfaces are curved or irregular, resort is often made to a vacuum bagging technique.
- In conventional vacuum bagging, an impervious or non-porous envelope or bag of flexible material is disposed around the assembly to be laminated. The envelope or bag is connected to a vacuum pump, and air is evacuated, causing pressure or compressive forces to be applied to the assembly. Often, a separate, porous, breather fabric is inserted between the bag and the article to facilitate withdrawal of residual gas and to provide release properties. Conventionally, the release or breather layer has included, for example, glass fabrics coated with polytetrafluoroethylene and is porous throughout its thickness.
- Various types of release or breather sheets are disclosed in the following U.S. patents: 3,666,600; 4,062,917; 4,216,047; 4,353,855; and 4,548,859. In the latter patent, a breather material is disclosed, which includes a ribbed fabric and a silicone rubber coating. Both the fabric and rubber layers are porous, and a separate impervious bag is disposed around the breather material to complete the assembly.
- The present invention provides a composite breather and vacuum bag material in the form of a flexible laminate having an outer non-porous layer and an inner surface breather layer which is impregnated with a release agent. This eliminates the necessity of using a separate breather material.
- The vacuum bag preferably comprises an outer, non-porous layer of silicone or similar rubber and an inner layer of heat resistant woven or braided textile of polymeric fibrous material. The textile is impregnated with a particular primer material to improve bonding to the outer elastomer layer and to provide a release coating in the exposed rough surface or interstices of the textile. The rough textile surface provides air passageways along the surface thereof to allow the bag material to be drawn tight against the surface of an object during application of a vacuum. The fabric surface provides sufficient passages to allow removal of air at the interface between the material and the surface of the object.
-
- Figure 1 is a plan view of the fabric or breather side of the composite vacuum bag material of the present invention.
- Figure 2 is a sectional view taken along lines 2-2 of Figure 1.
- Figure 3 is a perspective view of a vacuum bag made from the material shown in Figure 1 and 2.
- Figure 4 is a sectional view taken along lines 4-4 of Figure 3.
- As shown in the drawing, the composite vacuum bag material comprises a non-porous or void free elastomer layer or
sheet 10 bounded to one side of a woven or knittedfabric layer 12. Whereas the prior art has contemplated the use of separate breather and bag materials arranged in layers, the present material is a composite laminated sheet. - The fabric layer is preferably made from synthetic polymer fibers having a high degree of flexibility and good temperature resistance. Suitable materials include, for example, polyester, polyaramid, acrylic or the like, used alone or blended together or with other fibers. The fiber is preferably flexible and is capable of deforming under application of heat and pressure such that the vacuum bag will conform to the surface of the laminate. For this reason, relatively stiff fibers such as glass are not employed.
- The elastomer employed may be selected from a variety of rubbers. In the preferred embodiment, a silicone elastomer is employed, but others may be used such as fluorosilicones, fluoroelastomers, ethylenepropylene terpolymers, nitriles, and the like. Criteria for the elastomer include flexibility and heat resistance necessary to withstand repeated molding cycles.
- The woven or knitted fabric is first treated with a primer comprising the combination of a bonding and release agent prior to lamination to the elastomer layer. The fabric, for example, may be immersed in a dilute solution of the primer and then dried to release the solvent. Sufficient primer is applied to penetrate the fibers of the fabric, while leaving a rough coated surface of the fabric exposed upon drying.
- If a silicone elastomer is used, the fabric may be impregnated with a primer comprising a solution of a silicone rubber and an adhesive or coupling agent, such as a silane. The silicone rubber provides a good release finish to the exposed surface of the fabric. . The coupling agent and rubber provide a good bond between the fabric and the impervious elastomer layer.
- After application of the primer to the fabric and drying, the elastomer is calendered into a sheet and applied over the surface of one side of the coated fabric. The two layers are then heated under pressure for a sufficient length of time and conditions to cure the elastomer and to bond the elastomer layer to the fabric layer. During this procedure, the elastomer only partially penetrates the thickness of the fabric, leaving an exposed fabric surface on the opposite side, such surface being textured or uneven. This textured surface provides air passageways when the surface is brought against a facing surface of an article during vacuum bagging. That is, even though the treated fabric surface may come into surface contact with the surface of the article, the texture in the surface allows for continued remova.1 of air from the bag.
- Figures 3 and 4 illustrate a vacuum bag made from the material of the present invention. In the embodiment illustrated, a pair of
rectangular sheets article 34, such as an assembly of sheets to be laminated. - The open end may be closed by a suitable clamp after insertion of a
tube 36, which is connected to a vacuum pump. In the embodiment shown, the opposed lips of the opening are lined withstrips 38 of soft rubber. Clamping forces are provided by the use of abar magnet 40 disposed along one outer edge of the lip, and ametal bar 42 across the other edge, attracting the magnet and completing the air tight seal. - As shown, as pressure within the bag is decreased by removal of air, the outside air pressure exerts compressive forces on the
laminate 34. Also, although not shown, since heat is normally required in the lamination procedure, the bag and contained article would be disposed within an oven and heated to the desired temperature. - In a specific example of the present invention a knitted or woven polyester fabric is employed. Silicone rubber containing 1 to 5 percent silane is dissolved in a solvent system of tolulene and methyl ethyl ketone (5 to 35% solids) together with a benzoyl peroxide catalyst. The fabric is immersed in the solution, removed, and dried for 5 minutes at 180°F. The dry treated fabric contains from about 4 to about 40% of treatment solids.
- Silicone rubber compound is calendered on one side of the treated fabric at a thickness ranging from about .005 to about 0.1 inches. The typical rubber to fabric ratio is in the order of from about 2 to 1 to about 5 to 1. The composite is than cured under heat and pressure, i.e., from about 230°F to bout 350°F, and from bout 5 to about 150 psi. The cure conditions are such that the rubber film is pressed into the interstices of the fabric on one side but does not penetrate to the other side. The other side of the fabric contains visible interstices of the fabric, with a thin coating of silicone rubber that serves as a release agent. The resulting material can be employed as a vacuum bag operating at temperatures up to 275°F, with excursions up to 350°F. Other fabrics may be employed if higher operating temperatures are required. For example, fabrics composed of polyaramids will permit temperature excursions of up to 450°F, and glass fabrics will permit excursions of up to 500°F.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/915,043 US4702376A (en) | 1986-10-03 | 1986-10-03 | Composite vacuum bag material having breather surface |
US915043 | 1986-10-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0262321A2 true EP0262321A2 (en) | 1988-04-06 |
EP0262321A3 EP0262321A3 (en) | 1989-01-25 |
Family
ID=25435122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87110534A Withdrawn EP0262321A3 (en) | 1986-10-03 | 1987-07-21 | Composite vacuum bag material having breather surface |
Country Status (3)
Country | Link |
---|---|
US (1) | US4702376A (en) |
EP (1) | EP0262321A3 (en) |
JP (1) | JPS63100046A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6620284B2 (en) | 2000-08-03 | 2003-09-16 | Smc Corporation | Even pressure welding method by using fluid pressure |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0688391B2 (en) * | 1990-05-08 | 1994-11-09 | 日本金属工業株式会社 | Laminated board manufacturing method using atmospheric pressure |
US5439631A (en) * | 1994-03-16 | 1995-08-08 | Schneider; Paul R. | Process for manufacturing a grid-patterned membrane |
JPH10264187A (en) * | 1997-03-26 | 1998-10-06 | Takata Kk | Method for manufacturing bag body made of resin and bag body made of resin |
US5839582A (en) * | 1997-12-30 | 1998-11-24 | Strong; William P. | Self vacuum storage bag |
DE10160956A1 (en) * | 2001-12-12 | 2003-07-10 | Fibertex As Aalborg | Nonwoven and process for the production of glass or carbon fiber reinforced plastics |
US6799680B2 (en) * | 2002-04-05 | 2004-10-05 | The Holmes Group, Inc. | Vacuum sealed containers |
US20040050745A1 (en) * | 2002-09-13 | 2004-03-18 | Lee William Jonathon | Bag for vacuum sealing an item within |
US6851945B2 (en) * | 2002-12-11 | 2005-02-08 | Northrop Grumman Corporation | Seal-less reusable vacuum bag |
US20050131368A2 (en) | 2003-03-04 | 2005-06-16 | Diaperoos, Llc | Vacuum-packed diaper |
JP2005104821A (en) * | 2003-09-11 | 2005-04-21 | Nakamura Yoshiko | Decompression envelope for manufacturing laminated glass |
US7029267B2 (en) * | 2003-10-23 | 2006-04-18 | Saint- Gobain Technical Fabrics Canada, Ltd | Reusable vacuum bag and methods of its use |
JP4538271B2 (en) * | 2004-06-25 | 2010-09-08 | 藤倉ゴム工業株式会社 | Glass bonding bag |
US7726880B2 (en) | 2004-06-29 | 2010-06-01 | The Glad Products Company | Flexible storage bag |
US8419279B2 (en) * | 2004-06-29 | 2013-04-16 | The Glad Products Company | Flexible storage bag |
US7290660B2 (en) | 2004-07-23 | 2007-11-06 | Tilman Paul A | Storage system having a disposable vacuum bag |
US7153379B2 (en) * | 2004-10-15 | 2006-12-26 | General Electric Company | Methods of producing a ceramic matrix composite |
JP4616621B2 (en) * | 2004-11-10 | 2011-01-19 | 東洋ゴム工業株式会社 | Heated and pressurized bag for laminated glass production |
US8469193B2 (en) * | 2004-12-23 | 2013-06-25 | Worldwise, Inc. | Vacuum activated shipping container |
JP2006182581A (en) * | 2004-12-27 | 2006-07-13 | Fujikura Rubber Ltd | Glass bonding bag |
US7597479B2 (en) * | 2005-01-20 | 2009-10-06 | The Glad Products Company | Storage bag with fluid separator |
JP4503538B2 (en) * | 2005-03-07 | 2010-07-14 | 豊田通商株式会社 | Manufacturing method and manufacturing apparatus for seat pad reinforcing cloth |
US20070220829A1 (en) * | 2006-03-27 | 2007-09-27 | Li Chun W | Packaged product and method of manufacture |
EP1864916A1 (en) * | 2006-06-09 | 2007-12-12 | British American Tobacco France SAS | Container with magnetic sealing means |
FR2906754B1 (en) * | 2006-10-05 | 2008-11-28 | Saint Gobain | DEGASSING POCKET FOR LAMINATED GLAZING. |
US7857514B2 (en) | 2006-12-12 | 2010-12-28 | Reynolds Foil Inc. | Resealable closures, polymeric packages and systems and methods relating thereto |
AU2008218935B8 (en) * | 2007-02-23 | 2012-07-26 | Richard W. Rydin | Method of making a natural rubber vacuum bag by spray processes, Natural rubber vacuum bag made using spray process, and method for using natural rubber bag made using spray process |
US7784160B2 (en) | 2007-03-16 | 2010-08-31 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US7886412B2 (en) | 2007-03-16 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Pouch and airtight resealable closure mechanism therefor |
WO2008144035A1 (en) * | 2007-05-18 | 2008-11-27 | Rydin Richard W | Vacuum bag with integral fluid transfer conduits and seals for resin transfer and other processes |
US7946766B2 (en) | 2007-06-15 | 2011-05-24 | S.C. Johnson & Son, Inc. | Offset closure mechanism for a reclosable pouch |
US7857515B2 (en) | 2007-06-15 | 2010-12-28 | S.C. Johnson Home Storage, Inc. | Airtight closure mechanism for a reclosable pouch |
US7887238B2 (en) | 2007-06-15 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Flow channels for a pouch |
US7874731B2 (en) | 2007-06-15 | 2011-01-25 | S.C. Johnson Home Storage, Inc. | Valve for a recloseable container |
US7967509B2 (en) | 2007-06-15 | 2011-06-28 | S.C. Johnson & Son, Inc. | Pouch with a valve |
AU2008276353A1 (en) * | 2007-07-17 | 2009-01-22 | The Glad Products Company | Storage bag |
US20100205909A1 (en) * | 2007-07-24 | 2010-08-19 | Zimmerman Dean A | Storage bag |
US20090110335A1 (en) * | 2007-10-30 | 2009-04-30 | Leboeuf William E | Durable freezer to conventional oven bag with mating seal |
DE102010011067B4 (en) * | 2010-03-11 | 2014-02-20 | Trans-Textil Gmbh | Flexible sheet material for limiting a matrix material feed space and method for its production |
US8397958B2 (en) | 2010-08-05 | 2013-03-19 | Ds Smith Plastics Limited | Closure valve assembly for a container |
DE102012010271B4 (en) * | 2012-05-25 | 2017-10-12 | Premium Aerotec Gmbh | Process for producing a fiber composite component by means of a vacuum structure |
JP2018203593A (en) * | 2017-06-08 | 2018-12-27 | 東洋ゴム工業株式会社 | Molding bag for glass laminate |
JP6789179B2 (en) * | 2017-06-08 | 2020-11-25 | Toyo Tire株式会社 | Opening structure of molded bag for laminated glass |
JP6959100B2 (en) * | 2017-10-19 | 2021-11-02 | ニッタ化工品株式会社 | Manufacturing method of pulling cloth for molding bag |
JP6938022B2 (en) * | 2017-11-14 | 2021-09-22 | 東京R&Dコンポジット工業株式会社 | Breather cross |
US11858714B2 (en) * | 2021-01-15 | 2024-01-02 | Lucid Presence, LLC | Sealable vacuum luggage bag |
US11938690B2 (en) * | 2021-12-13 | 2024-03-26 | The Boeing Company | Methods for replicating a contour of a surface and transporting a composite material |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4425406A (en) * | 1982-06-21 | 1984-01-10 | Shatterproof Glass Corporation | Method and apparatus for producing laminated glass |
US4451321A (en) * | 1983-02-16 | 1984-05-29 | Shatterproof Glass Corporation | Flexible vacuum bag |
US4548859A (en) * | 1984-10-12 | 1985-10-22 | The Boeing Company | Breather material and method of coating fabric with silicone rubber |
Family Cites Families (11)
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US1704284A (en) * | 1928-09-28 | 1929-03-05 | Crawford Wilbur Francis | Harvesting sack |
US2243353A (en) * | 1938-09-09 | 1941-05-27 | P A Geier Co | Dust bag for suction cleaners |
US2488922A (en) * | 1944-09-20 | 1949-11-22 | Warren J Mead | Method for making impressions of objects |
US2674340A (en) * | 1952-12-18 | 1954-04-06 | Hoover Co | Filter bag coupling means for suction cleaners |
US2784757A (en) * | 1956-01-12 | 1957-03-12 | Coronet Of Palm Beach Inc | Closure for cases |
US2959832A (en) * | 1957-10-31 | 1960-11-15 | Baermann Max | Flexible or resilient permanent magnets |
US3358415A (en) * | 1964-11-09 | 1967-12-19 | Phillips Petroleum Co | Preventing deformation of vacuum formed containers |
US3289722A (en) * | 1965-03-04 | 1966-12-06 | Frederic G Hardenbrook | Flexible cooking bag |
US3705645A (en) * | 1971-04-30 | 1972-12-12 | Rohm & Haas | Inflatable flexible container and fabric for making it |
US4136205A (en) * | 1977-03-30 | 1979-01-23 | W. R. Grace & Co. | Container and method for packaging meat articles |
US4488647A (en) * | 1983-07-18 | 1984-12-18 | Paramount Packaging Corporation | Flexible package with easy opening peel seal |
-
1986
- 1986-10-03 US US06/915,043 patent/US4702376A/en not_active Expired - Lifetime
-
1987
- 1987-07-21 EP EP87110534A patent/EP0262321A3/en not_active Withdrawn
- 1987-07-30 JP JP62191486A patent/JPS63100046A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4425406A (en) * | 1982-06-21 | 1984-01-10 | Shatterproof Glass Corporation | Method and apparatus for producing laminated glass |
US4451321A (en) * | 1983-02-16 | 1984-05-29 | Shatterproof Glass Corporation | Flexible vacuum bag |
US4548859A (en) * | 1984-10-12 | 1985-10-22 | The Boeing Company | Breather material and method of coating fabric with silicone rubber |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6620284B2 (en) | 2000-08-03 | 2003-09-16 | Smc Corporation | Even pressure welding method by using fluid pressure |
DE10137463B4 (en) * | 2000-08-03 | 2006-05-04 | Smc Corp. | Equilibrium pressure welding with fluid pressure |
Also Published As
Publication number | Publication date |
---|---|
US4702376A (en) | 1987-10-27 |
EP0262321A3 (en) | 1989-01-25 |
JPS63100046A (en) | 1988-05-02 |
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